Valve



Oct. 12, 1937. J. J. SLAVIN ET AL,

VALVE Filed April 9, 1936 INVENTORS $3M BY s.

QTVLLM W W ATTORNEYS.

Patented Oct. 12, 1937 rent in VALVE John J. Slavin and Casper S.Stuckenholt, Cleveland, Ohio, assignors to The W. J. SchoenbergerCompany, Cleveland, Ohio, a corporation of V Ohio Application April 9,1936, Serial No. 73,562

1 Claim. (01. 2'z732) Our invention relates to new and usefulimprovements in gas fixtures and has reference to gas cocks. or valvesof the rotary plug type which ar-a provided with throttle screwadjustment means for accurately controlling the volume of gas flowingthrough the valve.

The general object of our'invention'is to provide a conveniently locatedinexpensive mounting f for thethrottle screw adjustment element.

: A further object of the invention is to "pro videmeans for eliminatingthe objectionable whistling noise heretofore caused in valves of thisgeneral type when the throttle is adjusted to re-i' duce the flow of gasto an approximate minimum. 1.5,

provide efiicient means for ieliminatingobjectionable throttlevalve-vibrations.

- A still further object of the invention iscto Otherobjects andadvantages will be apparent as the following description is consideredwith the acoompanyingdrawing, in which:

Figure 1 is a plan View of a valve embodying the invention;v .1

Figure2 is a section through the casing on the line 2-2 of Figure l, theplug valve being shown in full lines;

Figure 3 is a vertical section through the plug valve removed from thevalve casing showing the throttle valve and closure members assembled;

Figure lis a side view of the throttle valve removed{ and Figure 5 is afragmentary bottom plan view of the valve casing showing the washer inthe posi- ,tion assumed when the plug valve is in full open position.

Referring more particularlyto the drawing I denotes the cast metal valvebody member or casing, centrally and longitudinally bored or chambered,as at 2, to provide a substantially coneshaped seat 3 for a plug valve4, rotatably mount ed therein. Extending at right angles to the bore 2and in communication therewith at their inner ends, through axiallyalined inlet and outlet passages 5 and 6, are two extensions or branches1 and 8 respectively. The outer end of extension I is threadedexternally, as at 9, for connection with a gas manifold, not shown, andthe outer end of extension 8 is threaded internally,; as at I 0,

for connection with the burner of a stove or the The plug valve 4, whichis externallytapered to snugly fit and turn within the seat 3 formed inbore 2 of the casing I, has an integral extension orstem It providedwith oppositely extending integral wings or handle portions I5.

Preferably the plug t has a longitudinally extending axial passage orbore I6, communicating respectively through transversely extendingaligned oppositely disposed passages I1 and I8, with the inlet andoutlet passages 5 and 6 in the. casing, when the valve is in openposition.

Slidably but non-rotatably mounted upon the threaded lower end i9, of areduced extension 29, depending from the plug valve i, is a washer ZI,cut away as at 22, to, provide stop shoulders 23- and 24, adapted tocooperate with a lug 25 on the end wall 23 of casing I, in limiting themovement of the plug valve. Thus, when the plug valve l has been rotatedto the position shown'in Figures 1 and 2, with the wings I5 extendingparallel with the extensions or branches 7 and Bythe shoulder 23 engagesone end wall of stop lug 25 and halts the valve in full open position.Upon clockwise rotation of the valve approximately forty-five degreesfrom this position, the shoulder 24 will engage the other end wall ofstop 25, and the passages I? and I8 in the plug valve will have beenmoved out of register with the passages 5 .and 6 in the casing, thusclosing the valve. In order to prevent independent rotation of thewasher with respect to the valve, the extension 20, has one or more fiatfaces, and the opening 30 in the washer is correspondingly shaped,

A coil spring 2?, sleeved over the extension 20 engages with'its upperend the lower face of the washer 2i, and seats at its lower end againsta nut 28, threadedly mounted on the threaded end- I9 of the extension21?, thus forcing the washer against the end-wall 26 of the casing, andat the same time pulling the plug valve resiliently to its seat.Preferably a lock nut 29 is' employed to prevent the nut 28 frombecoming accidentally unscrewed.

' It will be noted that the round stem or extension M is much largerthan the conventional Valve stem and in fact is a continuation of theplug valve 4 and is of substantially the same diameter as the latter.The central longitudinally disposed bore I6 in the plug valve 4 alsocontinues on through the stem I l, and is screw threaded from t itsupper .end to a point slightly above the transverse inlet and outletpassages IT and I8, for a purpose about to be described. 7

In order to provide for a better and more accurate control of gas volumeflowing through the fixture, than is had with the conventional plugvalve, a throttle screw or valve 3| is threadedly mounted in the boreI6, of the plug valve 4 and its extension I l. The throttle valve 3| isformed with a threaded enlargement 32, the threads of which mesh withthe screw threads of bore I6, the lower portion of the throttle screwbeing unthreaded and terminating in a beveled end portion 33. When thethrottle valve is screwed home, this beveled end 33, seats against thecorrespondingly beveled bottom wall 34 of bore I6. The bottom wall 34,as will be noted from an inspection of Figures 2 and 3, is slightlybelow the transverse passages or openings IT and I8, thus forming a well553 in which the lower end of the throttle valve is accommodated. Whilethe fit of the throttle valve 3I in the bore I5 and well 50 is such asto permit of a very delicate adjustment being made, such fit is not sotight as to preclude a slight flow or seepage of gas in through passageI'I, around the unthreaded portion of the throttle and thence outthrough passage I8, when the plug valve is in open or partly closedposition. This construction is desirable, where the fixture is providedwith a pilot light connection on the outlet side of the casing, so thatthe pilot will be kept burning at all times when gas is being fed to theplug valve. Of course when the plug valve is turned to fully closedposition with the passages I! and I8 completely out of register with therespective passages 5 and 6, the fiow of gas to both burner and pilotwill be completely shut oil. A screw cap 35 closes the outer end of thebore I 6.

Experience has proven that where the end of the throttle is squared,objectional whistling was caused by the gas passing through passages I1and I8 striking the sharp edges of the throttle screw. This whistling isobviated, and a much more uniform flow assured, by beveling the end 33of the throttle.

Heretofore considerable trouble has been experienced with fittings ofthe general type disclosed herein, due to the fact that the throttlevalve would frequently be affected by vibrational stresses thus causingthe gas rate to vary to an objectionable degree. This objectionablevibration has been eliminated in the present invention by a small coilspring 36, which seats at its inner end against the end wall of a recess3'! formed in threaded enlargement 32, and at its other end against thethreaded wall of longitudinal passage or bore I6 of plug valve 4.

The location of throttle adjustment screw or valve 3| in the plug 4 addspractically nothing to the cost of the latter, as the only changenecessary in the conventional plug is to extend the bore or passage I6.On the other hand the location of the throttle in the plug obviates thenecessity of forming the customary separate chamber or housing for thethrottle on the casing I, as well as changes in the plug. The extendedouter hollow end or stem portion of the plug serves as a housing for thethrottle valve and at the same time the former can readily be cast withthe wings or handle portions I5. Furthermore, by mounting the throttleaxially in the hollow plug a much better control of the rather heavy gasflow pres ent in fittings of this type, is possible.

Having thus described our invention, what we claim is:

A valve comprising a valve body having a valve seat, a plug valverotatably confined in said seat, said valve body and plug havingcommunicating inlet and outlet passages, said plug having a bore inaxial alinement with the valve seat, a throttle JOHN J. SLAVIN. CASPERS. STUCKENHOLT.

